Singletrack Forum » Topic: combi boiler help..... please!http://singletrackworld.com/forum/topic/combi-boiler-help-please
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khayamolly on "combi boiler help..... please!"http://singletrackworld.com/forum/topic/combi-boiler-help-please#post-5284747
Thu, 29 Aug 2013 11:19:26 +0000khayamolly5284747@http://singletrackworld.com/forum/<p>thanks all single track mind sounds the mot likely as the shower is only a year old. However I am inclined to agree with dales rider and blame a rift in the space time continuum.<br />
thanks all will investigate</p>
<p>Khayamolly
</p>singletrackmind on "combi boiler help..... please!"http://singletrackworld.com/forum/topic/combi-boiler-help-please#post-5283300
Wed, 28 Aug 2013 20:10:18 +0000singletrackmind5283300@http://singletrackworld.com/forum/<p>Could be a faulty flow rate sensor . Lowish flow = very hot water , sensor then tells boiler tap/shower is off ( when it isnt ) and turns off heat. Water still runs but goes cold.<br />
See if you can recreate this by popping the cover and running a hot tap in the bathroom.<br />
The boiler will fire , and you will see flames, get your assistant to slowly turn down the flow rate. Shout when flames go out , if tap is still running then you have a problem somewhere.
</p>Junkyard on "combi boiler help..... please!"http://singletrackworld.com/forum/topic/combi-boiler-help-please#post-5283141
Wed, 28 Aug 2013 19:01:28 +0000Junkyard5283141@http://singletrackworld.com/forum/<p>not sure how it trips out on the hot tap as the temperature is controlled to 58 ish degrees iirc from mine.</p>
<p>I suspect the two are separate faults and mixer sounds like a good one.
</p>Dales_rider on "combi boiler help..... please!"http://singletrackworld.com/forum/topic/combi-boiler-help-please#post-5283130
Wed, 28 Aug 2013 18:56:22 +0000Dales_rider5283130@http://singletrackworld.com/forum/<p>Rift in time-space continuam
</p>Greybeard on "combi boiler help..... please!"http://singletrackworld.com/forum/topic/combi-boiler-help-please#post-5283091
Wed, 28 Aug 2013 18:37:16 +0000Greybeard5283091@http://singletrackworld.com/forum/<p>The shower symptoms suggest the mixer may be faulty. I had a faulty shower mixer that allowed cross-flow between hot and cold, even when in the off position, so as soon as I turn off the hot tap, cold water backfed into the boiler. Don't immediately see how that could cause your boiler symptoms but worth checking out - once your system is not working as designed lots of weird things can happen! Fixed by putting non-return valves in the the pipes to the shower (replacing the shower will be done sometime but is a big job as the pipes in the wall are non-standard).
</p>khayamolly on "combi boiler help..... please!"http://singletrackworld.com/forum/topic/combi-boiler-help-please#post-5283057
Wed, 28 Aug 2013 18:17:33 +0000khayamolly5283057@http://singletrackworld.com/forum/<p>hi out there,</p>
<p>i have a Bosch Worcester greenstar combi boiler I have a couple of problems with:</p>
<p>When I run the hot tap in the bathroom the boiler works fine for 3 -4 mins then trips out, restart and repeat. It only does this with this ONE hot tap in the house.</p>
<p>Recently when having a shower the hot water has become very twitchy ie it's either scalding hot or freezing cold, all within about 5 mm rotation of the shower mixer.</p>
<p>both faults are in the bathroom which is at the same level as the boiler. Don't know if that makes a difference but thought it might be relevant.</p>
<p>any thoughts anyone? (preferably folk with some plumbing heating knowledge!)</p>
<p>cheers<br />
Khayamolly.
</p>